Method for formation and preparation of linen roving for spinning

FIELD: textile, paper.

SUBSTANCE: according to the method, broken thread exiting drafting device is soaked in solution, by means of its compaction, rove is formed, and formed rove is wound onto reels of cross winding, which are chemically treated and then processed into yarn. Broken thread is soaked with electrochemically activated aqueous solution with oxidation-reduction potential from minus 1000 mV to plus 1000 mV, acidity of 2-11 pH at the temperature of 16-40°C, and produced rove, not earlier than in 30 minutes after the formation, is processed into yarn.

EFFECT: faster process of rove formation and preparation for spinning, reduced power inputs from 4200 kJ/kg to 3 J/kg and water consumption for chemical treatment of rove, rejection of chemical agents, which makes it possible to reduce costs of recycling coming as a result of chemical treatment of rove by solutions, and elimination of bulk and expensive equipment for chemical treatment of rove.

1 tbl

 

The invention relates to the textile industry, in particular to flax production, where the latest technological transition for the production of flax yarn use prefabricated in the form of rovings.

The sequence of processes of flax yarn consists of the formation of the fibrous product in the form of a tape having a constant weight (linear density), with its thinning - decreasing linear density on subsequent technological transitions. Ends the technology of preparation of fibres for spinning the formation of rovings - product with a linear density of 0.25-2.0 ktex. For winding it on the package, convenient to use for further technological transitions, rovings should have a certain strength. Along with used in industry by method of hardening Rove her otkruchivaniem known method of flax rovings (RU # 2208070 WITH, 01.07.2001)in which to improve its strength when forming a thin beam of fibers Micco coming out of the exhaust device, moisten with water. When this occurs, the bonding technical fibres of flax pectin substances in the composition of flax fibers.

To ensure the process preobrazovaniya and stability of course of rovings subjected to chemical treatment. (Lazarev S.E. and other Spinning flax with cooking smooth the qi. - M: Light industry, 1966.)

The purpose of this process is the weakening of ties between the elementary fibres in technical fibers. As a result of chemical processing Rove becomes possible to produce a yarn that meets the requirements of the standard in a wide range of linear densities with a stable process.

The process of chemical treatment has a number of disadvantages, which include large energy costs (4200 kJ per 1 kg of rovings), the use of chemicals, water usage, violation of the threading process, the obligatory presence of sewage treatment plants.

A known method of preparation of bast fiber materials indexes (RU # 2139374 C1, 11.12.98), in which for breaking ties between complexes and elementary fibers used electrochemically activated (ECHO) aqueous solution with a redox potential of minus 1000 to + 1000 mV, with acidity 2-11 pH, at a temperature of 16-40°C. When this processing is subjected to short fibre flax or flax tow intended to obtain cottonin and further processing on cotton technology. Using the resulting processed product as Rove is not possible.

The prototype of the present invention is the invention (RU # 227824 C1, 25.02.2003), in which Micco from flax fibers coming out of the exhaust device, moistened with a solution of soda ash Na2CO3with a concentration of from 10 to 35 g/l and thus form rescrutiny the rovings, which is wound into bobbins with cross coils that are subjected to chemical treatment. The use of soda ash allows the process of chemical processing Rove, since its formation on roving machine. But to complete a full cycle of chemical treatment on roving machine when this method fails, because the soda ash solution and Na2CO3is only the first of the solutions required for the preparation of flax rovings for spinning. Further chemical treatment is carried out, for example, in the following sequence (sodium silicate + bisulfate → hot water → water cold → acetic acid → water). The first two stages take place at a temperature of 95-100°C.

The technical object of the present invention is the reduced time, reduced energy and water consumption for chemical processing Rove, the rejection of the chemicals that will reduce waste resulting from chemical treatment Rove solutions.

This goal is achieved by the fact that the process of formation of Rove and its preparation (chemical about abode) to the drawing process in the exhaust device of the spinning machine are combined. In the process of formation of untwisted rovings used electrochemically activated solution with a redox potential of minus 1000 to + 1000 mV with acidity pH 2-11 at a temperature of 16-40°C.

The proposed method of forming Rove and prepare it for spinning is carried out as follows. Sliver formed in the exhaust device roving machine, with a linear density of from 0.25 to 2.0 ktex, passes through the reel false twisting, where it condenses and falls into the tubular chamber into which is fed the electrochemically activated solution. The solution wets Micco, due to surface tension forces of the liquid, there are the forces holding the fibers to each other. This leads to the fact that the thus formed product rovings, has sufficient strength to its winding on the coil. Simultaneously with the formation of Rove begins cleavage complexes contained in the technical fiber, at the elementary fibers, and the breach of relations between the fibers continues in the roving wound on the spool. The range of these parameters electrochemically activated solution is determined by the requirements of the processed rovings, and depends on the properties of the original fiber, prepared for yarn production. The experiment is correctly installed, when choosing the right activity of the solution violation of connection between the elementary fibres in technical fibers occurs within 30 minutes, after which the rovings ready for the formation of yarn on a spinning machine.

Electrochemically activated solution within three days lose their properties, into the water, which does not require special cleanup for disposal.

Implementation of the proposed method is illustrated by the following examples.

The definition of the parameter charge electrochemically activated solution to achieve readiness level (violation of links between the elementary fibres) Rove to the process of preobrazovaniya depends on the type of fibers used.

To achieve the goal of obtaining a semi-finished product, capable of processing into yarn that meets the requirements of the standard, it is necessary to observe the processing modes shown in the table.

Charge ECHO solution, mVAcids
ness ECHO of solution pH
Fiber typeFlexibility, mmThe content of incrusted, %Fiber content associated with lignification, %Time education
Bo is key, min
Description of the drawing process
+10002,0Very gross45-50above 3,503015Unstable
30Stable
60Stable
+7004,0Gross50-55of 3.25 to 3.516-2515Unstable
30Stable
60Stable
-100011,0Medium soft55-603,00-3,2514-1615Unstable
30 Stable
60Stable
-7009,0Soft50-602,75-3,0012-1415Unstable
30Stable
60Stable
-5008,0Very softMore than 60to 2.7510-1215Unstable
30Stable
60Stable

In the last column of the table shows the qualitative characteristics of the drawing process rovings obtained according to the proposed method, in the exhaust device of the spinning machine, depending on the processing time. These data allow to set the minimum time that is necessary is to obtain a positive effect, - 30 minutes. The intensity of the process depends on the temperature of the solution. At lower temperature the intensity of the falls, and at temperatures below 14°C, the process proceeds so slowly that its use becomes impractical. With increasing temperature intensifies the process, but at the same time reduces the relaxation time of the solution, i.e., it quickly loses electrochemical potential and turns into water. When the solution temperature more than 40°C this occurs until the completion rovings for spinning. Thus, the recommended temperature range is 14-40°C.

The beneficial effects of the present invention is to accelerate the formation and training of rovings for spinning and delisting bulky and expensive equipment for chemical processing Rove, the reduction of energy consumption with 4200 kJ per 1 kg Rove to 3 j/kg, the special exception process recycling of used reagents.

The method of formation and preparation of flax rovings for spinning, whereby opening of the exhaust device Micco dipped in the solution, by its seal form the rovings and wound rovings formed on bobbins with cross winding, which are subjected to chemical treatment, and then processed into yarn, characterized in that h is about Micco moisten the electrochemically activated aqueous solution with a redox potential of minus 1000 mV to + 1000 mV, acidity 2-11 pH at a temperature of 16-40°C, and the rovings not earlier than 30 min after the formation is processed into yarn.



 

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FIELD: textile industry, in particular, non-circular weaving equipment, for example, weaving units.

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The invention relates to spinning textile industry and relates to a method of forming untwisted rovings from flax fiber

FIELD: textile industry, in particular, non-circular weaving equipment, for example, weaving units.

SUBSTANCE: apparatus has shaft disposed between columns and adapted for carrying of rotary lever with rotating pressure roll, and spiral spring. Shaft is immovably fixed between flat columns attached by means of bolt-type protrusions to vertically arranged base. Spiral spring is mounted on shaft and spring ends are fixed on rotary lever and on one of columns. Shaft is made stepped and is equipped with basic end portions terminating in threaded parts. Flat columns have rectangular portions continued with bolt-type protrusions. Column arranged at the side of spring end has cylindrical opening for accommodation of rectilinear end of spring. Cylindrical recess provided in rotary lever hub aperture on its internal surface at the side of arrangement of spring is adapted for accommodation of rectilinear end of spring.

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FIELD: textile, paper.

SUBSTANCE: according to the method, broken thread exiting drafting device is soaked in solution, by means of its compaction, rove is formed, and formed rove is wound onto reels of cross winding, which are chemically treated and then processed into yarn. Broken thread is soaked with electrochemically activated aqueous solution with oxidation-reduction potential from minus 1000 mV to plus 1000 mV, acidity of 2-11 pH at the temperature of 16-40°C, and produced rove, not earlier than in 30 minutes after the formation, is processed into yarn.

EFFECT: faster process of rove formation and preparation for spinning, reduced power inputs from 4200 kJ/kg to 3 J/kg and water consumption for chemical treatment of rove, rejection of chemical agents, which makes it possible to reduce costs of recycling coming as a result of chemical treatment of rove by solutions, and elimination of bulk and expensive equipment for chemical treatment of rove.

1 tbl

FIELD: textiles, paper.

SUBSTANCE: invention relates to the textile industry, in particular to flax spinning production, where, at the last manufacturing step, to produce flax yarn the semi-finished in the form of roving is used. The method of formation and preparing flax roving for spinning, according to which, broken thread exiting drafting device is soaked in electrochemically activated water solution with an oxidation-reduction potential from minus 1000 mV to plus 1000 mV and the acidity of 2-12 pH at the temperature of 16-40°C. And the wetting is carried out directly to the cavity of the chemical reactor designed for obtaining electrochemically activated water solution.

EFFECT: invention enables to reduce the time, to reduce energy and water consumption for chemical treatment of roving, refuse chemicals which can lead to lowering disposal costs resulting from chemical processing of roving, solutions.

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